<!DOCTYPE html>
<html>
<head>
  <script src="../../processing.js"></script>
  <script src="../init.js"></script>
<link rel="stylesheet" href="../style.css"/></head>
<body><h1><a href="http://ejohn.org/blog/processingjs/">Processing.js</a></h1>
<h2>Keyboard</h2>

<p>Click on the image to give it focus and press the letter keys 
to create forms in time and space. Each key has a unique identifying 
number called it's ASCII value. These numbers can be used to position 
shapes in space.</p>

<p><a href="http://processing.org/learning/basics/keyboard.html"><b>Original Processing.org Example:</b> Keyboard</a><br>
<script type="application/processing">
int numChars = 26;
color[] colors = new color[numChars];
int keyIndex;
float keyScale;
int rectWidth;

    
void setup()
{
  size(200, 200);
  noStroke();
  background(0);
  keyScale = 200/numChars-1.0;
  rectWidth = width/4;
}

void draw()
{ 
  if(keyPressed) {
    if(key >= 'A' && key <= 'z') {
      if(key <= 'Z') {
        keyIndex = key-'A';
      } else {
        keyIndex = key-'a';
      }
      fill(millis()%255);
      float beginRect = rectWidth/2 + keyIndex*keyScale-rectWidth/2;
      rect(beginRect, 0.0, rectWidth, height);
    }
  }
}
</script><canvas width="200" height="200"></canvas></p>
<div style="height:0px;width:0px;overflow:hidden;"></div>

<pre><b>// All Examples Written by <a href="http://reas.com/">Casey Reas</a> and <a href="http://benfry.com/">Ben Fry</a>
// unless otherwise stated.</b>
int numChars = 26;
color[] colors = new color[numChars];
int keyIndex;
float keyScale;
int rectWidth;

    
void setup()
{
  size(200, 200);
  noStroke();
  background(0);
  keyScale = 200/numChars-1.0;
  rectWidth = width/4;
}

void draw()
{ 
  if(keyPressed) {
    if(key &gt;= 'A' && key &lt;= 'z') {
      if(key &lt;= 'Z') {
        keyIndex = key-'A';
      } else {
        keyIndex = key-'a';
      }
      fill(millis()%255);
      float beginRect = rectWidth/2 + keyIndex*keyScale-rectWidth/2;
      rect(beginRect, 0.0, rectWidth, height);
    }
  }
}</pre>
</body>
</html>
